Hydraulic elevatoe valve



2 Sheets-Sheet- 1.

(No Model.)

1. H. VENN.

HYDRAULIC ELEVATOR VALVE.

N0. 398,098. Patented Feb. 19, 1889.

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IX (No Model.) 2 Sheets-Sheet 2.

I. H. VENN.

HYDRAULIC ELEVATOR VALVE. No. 398,098. I v Patented Feb. 19, 1889.

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NlTED STATES PATENT OFFICE.

ISAAC H. VlYN, OF YONKERS, NElV YORK, ASSIGNOR OF ONE-HALF TO ELBRIDGE G. V. BARTLETT, OF SAME PLACE.

HYDRAULIC ELEVATOR-VALVE.

SPECIFICATION forming part of Letters Patent No. 398,098, dated February 19,1889.

Application filed April 11, 1888. Serial No. 270,830. (No model.)

To all whom it may COYLCGTI'L.

Be it known that I, ISAAC H. VENN, a citizen of the United States, residing at Yonkers, county of lVestchester, State of New York, have invented certain new and useful Improvements in Hydraulic Elevator-Valves, of which the following is a full, clear, and exact specification.

This invention relates to a valve-operating device particularly adapted for use in connection with hydraulic elevators to direct the passage of the motor-fluid which operates the main valve, which in turn directs the flow of the fluid to the main piston of the elevator; and it consists of a construction whichis simple, is easily operated, and serves to direct and limit with great accuracy the movements of the heavier parts of the apparatus, as will be hereinafter described.

In the drawings, Figure l is a central vertical section of a valve device embodying my invention. Fig. 2 is a similar view showing the parts in another position; and Fig. 3 is a crosssection on the line 3 3, Fig. 1.

A designates the casing, in which are mounted the operative parts of my invention, and which is connected through the circulating-passages J and K with the main elevator cylinder, respectively above and below the piston therein, and through the said pipe J with the 1notor-fluid supply.

B represents the main valve, which by its position regulates the passage of the operating-fluid to and from the main elevator-cylinder in the well-known manner. It is carried by a chambered rod or tube, 0, which is at its ends provided with piston-heads D D, which, as well as the valve B, are suitably packed and travel in contact with the brass bushing or lining a of the casing, made, by

preference, in three separate sections, as-

shown.

C is the auxiliary valve suitably connected to be worked from the elevator-cage or other desired place, and consisting of a small rod passing. centrally through a head, F, of the casing, the piston-heads D, the tube 0, and a cross-head or plate, E, in the lower part of the casing. This valve is provided with two fluid-passages, M and N, situated in proximity, respectively, to the lower and upper piston-heads, D, and adapted to have their in ner ports, at 47, covered thereby, such inner ports being situated at a distance apart equal to the distance between the piston-heads.

P is a port in the tube 0, through which there ismaintained acommunication between the interior of said tube and the interior of the casing on that side of the valve B on which the circulating-pipe J enters; and L L are fluidpassages leading to the dischargepipe Q around the plate E from the interior of that part of the casing on the side of the valve ll opposite to the circulating-pipe J.

I is an annular chamber situated in the head F of the casing, adapted to receive the waste'fluid from above the upper valve D and deliver it through a drip-pipe, R, which is shown entering the .lischarge-pipe Q.

The operation of the device may now be understood.

Referring to Fig. l, which shows the position occupied by the parts when the elevator is at rest, it will be seen that the passage K from below the main piston of the elevator is closed by the valve B, and that the inner ports of the passages M and N are covered by the piston-heads D D, so that there is no escapepassage for the fluid from the feed-pipe or from below the elevator-piston, and hence no motion can take place. If new it is desired that the parts should occupy the position shown in Fig. 2, where the valve 13 is indicated as being between the fluid-passages J and K, so that the fluid is entering above the elevatorpiston and exhausting through passages K and L from below it, and the latter consequently falling, the auxiliary valve 0 is raised, (from the position shown in Fig. 1,) uncovering the passages M and N. The motor-fluid in the tube 0 and the feed-pipe J, which is under pressure, now passes through the passage M to the lower side of the lower piston D, while the upper side of the upper piston is in communication with the discharge through the passage N, the chamber I, and the pipe R. The equilibrium of the main valve device is thus destroyed by reason of the under face of the lower piston-head D being acted upon by the fluid under pressure from the tube 0, passing through the passage M, while there is no pressure upon the upper face of the opposite clevator-pision should. ascend, in which case i i l the valve B would occupy a position below 1 the passage l\'., the auxiliary valve is moved downward below the position shown in Fig.

the casing, and an auxiliary adjustable valve to each piston, and passages connecting the said ports, substantially as described.

2. The con'ibination, with. the main. valve and the casing, of the tube to which the main valve is secured, provided. at its ends withv piston-heads and having aport, 1-, through which the interior of the tube communicates f with the fluid-feed supply, and an auxiliary 1,which establishes a communication between the motor-fluid in the tube and the upper i casing a'bove the upper piston-head D through the passage N, the ports n n whereof are respectively below the upper piston-head and the casinghcad F, while the fluid below the lower piston may exhaust through the passage M, the lower port, at, whereof is below the casing head or plate E and opening into the dischargepipc Q. \Yhen the parts are in this position, the fluid circulates from above to below the elevator-piston through thepipes J and K, the valve 1;, being below the pas sage h, not intercepting such How, and consequently the elcvator- 'iiston rises until the position of the valve device is changed.

An essential feature of this invcmtcion is the hollow rod or tube by which the main valve is moved, the interior of which is in constant communication with the ll uid under pressure, in combination with the auxiliary valve, by which the fluid is directed from the interior of the said tube to a piston connected with the said tube, and by which, under the pressure of said fluid, it is moved.

From the above description and an examination of the drawings it will be seen that the amount of motion given to the main valve, and hence the speed at which the elevator is I run, depends entirely upon the extent to which the auxiliary valve is moved, since as soon as the ports m and n of the latter are closed by the piston-heads all motion of the parts must cease.

The parts of 1n y device are simple and inexpensive and not liable to get out of order, and, being light, are operated by the expenditure of but little force.

It will be understood that in the details of construction my invention maybe modified or changed from that form which I have shown in the drawings without departing from the spirit thereof.

\Vithout limiting myself to the precise construction and arrangements of parts shown, I clai1n- 1. The coml'iination, with the main pipe for the motor-fluid, the main valve and its casing, of a tube carrying the main valve between its ends, pistons at the ends of said tube fitting 3 head, and an auxiliary v valve having fluid-passages pro v ided with two ports adapted to be moved to opposite sides of the said piston-head or to be covered thereby and arranged to deliver the fluid from the interior of the pipe to one or the other of the outer faces of the piston-heads, substantially as described.

The eoml'iination oi. the main valve, a tube carrying the main valve between its ends, pistons at the ends of the tube, the easing in which the main valve and the pistons are fitted, having the cross-plate E adjacent to one of the pistons, and the discharge-passages L L passing around the said head, and an auxiliary valve arrai'iged. to deliver the motor-fluid to opposite sides of the said pistons to move the main valve, substantially as described.

4. The combination, with the main valve, of the tube to which is secured the main valve, provided with a piston and having a port through which it communicates with the motor-fluid, a casing-head opposite the pistonhcad, a disehargepassage beyond the casingalve passing through the tube and the head and having a fluidpassage in proximity to the head, adapted as said valve is moved either to make commit nication between the tube and the space between the piston and casin heads orhetween said space and the discharge-passagc, substantially as described.

5. The combination, with the main valve and the casing, of the tube 0, to which the main valve is secured, provided at its ends with piston -heads, and having a port, P, through which the interim oi the tube communicates with the flu id-feed-su pply pipe, and an auxiliary valve, 0, having the fluid-passages M and N, and the discharge-passages situated,respectively, adjacent to the two pi ton-heads, substantially as deseriliied.

In testimony whereof I have signed my name to this specification in the )resence of two subscribing witnesses.

I SAAQ ll. 'VENN.

Witnesses:

Janus S. 'Frrcn, JOHN J. SPEIGHI. 

